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Why it's difficult to accurately test the efficiency of a plug-in car

When it comes to electric vehicles and plug-ins in general, the Environmental Protection Agency-certified range is a hugely important number. While actual range anxiety is largely psychological, the magic number does provide a point of comparison of buyers considering one EV over another. The driving distance is also often touted by automakers when marketing their models. Unfortunately, as Green Car Reports finds in a recent deep dive, the way the EPA calculates the figure is a convoluted mess, and discovering the reasons why is definitely worth the read. The issue isn't about bad science but instead comes down to vague wording. The EPA's accepted range test is sourced from an evaluation called J-1634 from the Society of Automotive Engineers, and it seems to provide balanced results for vehicles that automatically reach a single state of charge when plugged in. However for models with multiple charge settings, the situation gets complicated very quickly. Of course, these modes are often created in the software, meaning that a car's certified driving distance can change with just a few taps of the keyboard without the real world results owners might experience actually changing. By showing the test's effects on the certified range for the Tesla Model S, Nissan Leaf and Mercedes-Benz B-Class Electric Drive over the last few years, Green Car Reports makes a compelling argument that it's the evaluation that needs to change. Thankfully, it appears that the solution is a very simple one. Get the details here.

Brabus-tuned Mercedes G500 4x4 is an over-powered off-roader

Even from the factory, the Mercedes-Benz G500 4x42 is an off-road bruiser that's good for 415 horsepower and 450 pound-feet of torque. Apparently, those already meaty figures just aren't enough for the power-hungry folks at Brabus. The company's new tuning kit for the twin-turbo 4.0-liter V8 pushes things up to 493 hp and a prodigious 523 lb-ft of twist. On top of the grunt, buyers can order a heap of extras to make the SUV look a whole lot meaner. They're all going on display at the 2015 Frankfurt Motor Show. The heart of Brabus' power upgrade is its custom control module to tweak the engine management, and the result is adjusted boost pressure and the mapping for the fuel injection and ignition. There's also a stainless steel exhaust with butterflies that vary between "Sport" and an appropriately named "Coming Home" mode at the press of a button. The chrome tailpipes add an extra visual pop, too. The G500 4x42 rides on off-road tires, and even after Brabus' big boost, it's not lightning quick. The run to 62 miles per hour now takes 6.9 seconds, and the rubber also mandates a top speed limited to 130 mph. For buyers really looking to show off, Brabus has a wild body kit for the G500, too. It includes new lower bumpers and polished underbody guards. Meanwhile, the hood grows a scoop, and the headlight update adds black-tinted Xenon lights with LED turn signals to replace the units usually on the fenders. Inside, a mix of quilted leather, Alcantara and bright red stitches finishes off the brash tweaks. World premiere at the IAA 2015 BRABUS refines the Mercedes G 500 4x42 368 kW / 500 HP, 710 Nm of torque and exclusive BRABUS luxury appointments for the extreme off-roader Mercedes G 500 4x42: the new special model of the G-Class is designed for maximum off-road capabilities and offers the perfect basis for exclusive refinement a la BRABUS (Brabus-Allee, D-46240 Bottrop, phone +49 / (0) 2041 / 777-0, fax +49 / (0) 2041 / 777 111, Internet www.brabus.com). This includes an increase in the power output of the twin-turbo V8 to 368 kW / 500 HP (493 bhp) and a boost in its peak torque to 710 Nm (523 lb-ft). As a result, the tuned off-roader sprints from rest to 100 km/h (62 mph) in just 6.9 seconds. Due to the all-out off-road tires, the top speed is limited electronically to 210 km/h (130 mph). The spectacular appearance of the all-wheel-drive car is bolstered further by a high-end BRABUS paint finish and targeted BRABUS bodywork modifications.

Mercedes A-Class next up for facelift

This is the coming Mercedes-Benz A-Class, and in case the paucity of camouflage didn't make it clear, it won't look much different the one that's been on sale for all of two years. Caught in Sweden braving the temperatures, its exterior updates aren't expected to go much further than a reworked face that brings it in line with the recently updated B-Class, including a new grille, headlights and taillights, and bumpers. The cabin is where most of the work is being done, to give it a better punch against the BMW 1 Series. A tweaked dash cluster, better fabrics and materials, the eight-inch tablet-style nav/multimedia screen, and ambient lighting should join the party. The updated range of B-Class engines should also make the jump into the A. A photo caught at a dealer meeting in Barcelona last year makes us pretty sure it will be introduced at the Frankfurt Motor Show in September this year. Until then, there are spy shots to peruse.